National Semiconductor LP2981IM5X-2.5/NOPB

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Product attributes Property Value
Manufacturer National Semiconductor
Product Series
Packaging |
Output Configuration Active
Output Type Positive
Number of Regulators Fixed
Voltage - Input (Max) 16V
Voltage - Output (Min/Fixed) 2.5V
Voltage - Output (Max) -
Voltage Dropout (Max) 0.37V @ 100mA
Current - Output 100mA
Current - Quiescent (Iq) 95 μA
Current - Supply (Max) 1.7 mA
PSRR 63dB (1kHz)
Control Features Enable
Protection Features Over Current, Over Temperature, Short Circuit
Operating Temperature -40°C ~ 125°C
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case SC-74A, SOT-753
Supplier Device Package SOT-23-5
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The LP2981IM5X-2.5/NOPB is a low-power fixed 2.5V linear regulator from National Semiconductor, delivering up to 100mA. Its ultra-low quiescent current of 95μA and dropout of 0.37V make it ideal for battery-operated devices. The SOT-23-5 package is perfect for compact PCB designs.

  • Ultra-Low Quiescent Current: 95μA extends battery life in portable devices.
  • Low Dropout: 0.37V at 100mA maximizes efficiency.
  • Compact Size: SOT-23-5 package saves board space.
  • Stable 2.5V Output: Ideal for low-voltage digital and analog circuits.

Battery-Powered Devices

With a low quiescent current of 95μA and 0.37V dropout, it extends battery life in portable electronics like wearables and remote sensors.

Portable Medical Monitors

Provides stable 2.5V for low-power medical devices such as glucose meters and pulse oximeters.

Wireless IoT Modules

Ideal for powering microcontrollers and RF transceivers in IoT nodes, ensuring clean power with minimal power loss.

Smart Home Sensors

Compact SOT-23-5 package fits space-constrained designs for temperature, humidity, and motion sensors.

Handheld Instruments

Supports low-power digital multimeters and calibration tools requiring precise 2.5V reference.

Q: What is the output voltage?
A: This is a fixed 2.5V output regulator.
Q: What is the maximum output current?
A: It can supply up to 100mA.
Q: What is the input voltage range?
A: The input voltage is 2.5V (nominal).
Q: What is the dropout voltage?
A: Dropout is only 0.37V at 100mA load.
Q: What is the quiescent current?
A: Quiescent current is very low at 95μA.
Q: What package is available?
A: It comes in a compact SOT-23-5 package.
Base Product Number : LP2981IM5
100mA 2.5V Fixed LDO Linear Regulator Low Dropout Low Quiescent LP2981 National Semiconductor SOT-23-5
Q: What is the output voltage?
A: This is a fixed 2.5V output regulator.
Q: What is the maximum output current?
A: It can supply up to 100mA.
Q: What is the input voltage range?
A: The input voltage is 2.5V (nominal).
Q: What is the dropout voltage?
A: Dropout is only 0.37V at 100mA load.
Q: What is the quiescent current?
A: Quiescent current is very low at 95μA.
Q: What package is available?
A: It comes in a compact SOT-23-5 package.